Delayed cut-off for bunsen gas-burners



R. D. SMITH.

DELAYED CUT-OFF FOR BUNSEN GAS BURNERS.

APPLICATION FILED LULY 2a. 19!.6. RENEWED AUG. 12.1919.

Patented May 18, 1920a UNITED STATES PATENT our-non i RAYMOND D. SMITH, 9F BOSTON, MASS AGHUSETTS ASSIGNOB TO TBEMONT PRODUCTS COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION 01' MASSACHUSETTS.

DELAYED oU'r-orr roa Bunsen eas-nunnnns.

Specification o! Letters Patent.

' Patented May 18, 1920.

Application filed July 28, 1916, Serial No. 111,934, Renewed August 12, 1919. Serial No. 317,097.

To all whom it may concern:

Be it known that I, RAYMOND D. SMITH, a citizen of the United States, residing in Boston, county of Suffolk," and Common: wealth of Massachusetts, have invented certain new and useful Improvements in Delayed Cut-Ofis for Bunsen Gas-Burners, of which the following is a specification.

My present invention relates to delayed cut-offs for as burners of the Bunsen type and particu arly, but not -exclusively, to burners for illuminating purposes, wherein 7 light is produced by the incandescence of a usual mixing chamber for the gas an mantle or non-combustible fabric structure, exposed to the intense heat of the Bunsen flame. More specifically still, my invention relates to a type of incandescent gas burner employing a cluster of downwardly hanging mantles supported at the top of a central upright burner stem andsuppliedwith fuel through said stem.

The objectof my invention 1s to PI'OVldQ in a self-contained'Bunsen gas burner and controlling valvestructure (including the air.

herein shown in vertical or upright form, with the usual gas injector'and air-intake opening construction at the bottom of such mixing chamber) manually-operable, automatic actuating means for said controllmg valve, adapted upon suitable actuation theretomatic closure of the-valve. The time'interval before such closure is then controlled by thermostatic means subject to the heat of a normally inactive auxiliary burner to whichgas is supplied by the same actuation that tensions said automatic actuating means, and which is thereupon ignited by the heat from the main mantle burnerand thermally energizes the thermostat, releasing said automatic'means and causing thereby a quick and positive closure of the valve.

and complete extin ishment of both the main and auxiliary urners.

A further object of my invention is to provide in a compact and simple illuminating burner structure employing at the top of the mixing chamber a cluster-of mantles sus-.

' pended from radially outbranching portions 1 tomatic ignition -of the latter from the heat of said mantles is obtained, and further so that the mantles, which are very frail and brittle,shall not be impaired by such ignition.

I A still further, and an important, object ofmy present invention is to so relate the auxlliary burner to the air-intake opening of the main'Bunsen burner mixing chamber that the flame of the former shall be operatlvely remote from such opening and from the current of air therethrough, so as to avoid back-firing in the mixing chamber of said main Bunsen burner or accidental ignition (from the auxiliary flame) of the gas in said. mixing chamber at its place of injection thereinto.

Otherspecific details and objects of my invention will appear from the drawings, description and claims hereof.

In the drawings: Figure 1 is a plan view of the entire burner and valve structure with .shade omitted and casing for valve mechanism broken awa Fig. 2 is an enlarged partial section ta en on the plane -2--2 in Fig. 5 showin the arrangement of valve ports and their relative positions during normal 0 eration of the main illuminating burner, ig. 3 is a section similar to Fig. 2,

but showing a difierent relation of ports: Fig. 4 shows the relation of valve orts when the light has been extinguished; ig. '5 is an elevation, partly in section, looking at the right of Fig. 1, theupper burner structure being omitted and certain parts broken away; Fig. 6 is a rear elevation of the entire burner and valve structure with the shade, shade-holder and certain other details shown in section; Fig. 7 is a front elevation of the valve mechanism and certain auxil iary burner parts, the mechanical parts being shown in their positions after manual actuation of extinguishing means and before automatic closure of the valve, or while the thermostat is being heated; Fig. 8 is a view similar to Fig. 7, showing the positions of arts after automatic closureof the valve.

imilar and corresponding parts are indicated in the drawings and designated in the following, description by the same numerals.

air openings 8 in the the main Bunsen burner. Spring clips 5-are shown bearing upon theedges of the mantle-' top supporting rings for preventing the loosening or unscrewing of said rings by possible vibration or jarring. At the bottom ofthe mixingchamber 4 is shown the- I usual gas injection and air-intake construction, wherein adjustment of the gas supply may be'had b' means of the upwardly pointing needle va ve plunger 6 and the conically pointed screw 7 and wherein adjustment of wallof the mixing cham er maybe had by the rotary adjustment of the hood 9 which has corresponding openings 10 that may be made toregister with the openings 8; such Bunsen gas burner construction being well known in the'art.

The combined mantle supporting stem and mixing chamber 4 terminates below the needle valve construction in an internally threaded portion 11 and is mounted upon a valve block 12 which latter at its bottom, has

an internally threaded portion 14, by means of which the entire structure may be mounted upon the usual gas bracket cr -chandelier.

Clamped between the stem 5 and the valve block 12'is the base of a three-armed bracket or shade-holder 13. I A spring clamp-wire 17 holds the shade 16 firmly seated on the bracket 13. I I

The valve block 12 contains the usual rotary tapered valve plug 15 whose axis lies transverse of the main gas passage 18,

through said block, and which when ro-.

tative y actuated by mechanism to be described hereinafter, controls the supply of gas to both the main burner stem 4 and to a small auxiliary Bunsen heating burner 21 which extends upwardly from a bracket extension 22, of the valve block. It should be carefully noted that the upper orifice of the auxiliary heater burner 21 is at a substantially higher level than the open bottom portion of the air-intake opening hood 9, and that said hood efliciently separates the said air-intake opening from the burner-21. Were such openings not thus shielded from the flame of the auxiliary burner, the latter would ignite into the main Bunsen burner mixing cham+ her, and thereby impair the o eration of the main illuminating burner. djustment of the supply of gas to the burner 21 may be had by the screw 23.

In another brackeflextension 24 of the valve block 12, an upwardly slanting gas port 27 is shown leading from the main gas passage, below the valve plug 15. to the base of an upright gas conducting tube 25 which at its top, terminates in a smallburner tip But from Fig. 7 it the gas at its point of injection '28 adjacent to one of: the mantles. -.'Gas supply to this adjusting screw 26. be evident that the small of the tube commonly called a will remain constantly burnin indepen ent of the valve plug 15 and that t is flame is so situated as to ignite the main mantle burner whenever gas is sup lied to the latter. Referring particu arly to F igs'. 1, 7 and 8,

shall now describe the mechanism by which the movement of the valve plug 15 is controlled. Manual control of this mechanism is afforded by the chains 65 and 68. A downward pull on swings the spring-actuated latch lever 66 to the broken line position indicated in Fig. 7,

tube may be controlled by the hen ignited, it will flame 29 at the top pilot li ht,

thus disengaging it from the locking prochain 68 .in Fig. 8 first loosely and pivotally 1 mounted on a stem extension 30 of the valve I plug 15, and, at its other end, carries the control chain 65. Further pull on the chain 68 will therefore swing the control lever 35 to its position indicated by broken lines in Fig. 8, where said lever will be stopped by engagement with another projection 54. of

the supporting plate 31. During this move-' ment, the valve plug tated ment of the control lever 35 with a-rearwardly bent extension 37 of the dog member has been positively ro- 36, the latter being fast to the end of the valve stem 30 and normally maintained in such engagement with the control lever 35 by a spring 38. Control chain 65 may now be pulled downwardly which will swing the control lever 35 in the reverse direction until thespring latch lever 66 automatically looks it in the position shown in Figs. 7 and 8.

will be seen that durin the latter movement, the dog member 36 has been intercepted in an intermediate position and thatv it is held in this position against the action of spring 38 by a spur-shaped projection 52 carried past to the inner surface of the curved, bi-metallic. thermostat 53.

The thermostat 53 is mounted at one end to the projection 54 of the supporting plate 31 and is clamped thereto in surface contact'with the base of an upwardly extending heater member 56 by screws 55, 55. The heater member 56 terminates in a hooded portion 57 that is perforated at its top and is positioned directly over the auxiliary burner 21. A loose, stationary roller 61 is a corresponding amount by engage actuated latch 46 pivoted to thedog member at 47and capa le of yielding in one direction only, namely counter-clockwise in Fig. 7, or when passing the spur 52 by clockwise rotation of the dog member 36. A casing 33 is provided for the valve mechanism.

Having thus described the controlling mechanism I shall now explain the operation of the complete burner and valve arrangement after which'I shall point out what constitutes the novel features of my invention in the appended claims.

Starting from. the position of parts as shown in Fig. 6 and by broken lines in Fig. 8 (where the valve ports are related as in Fig. 2 and where the main mantle burner is lighted and adapted for continuous operation) when it be desired to extinguish the light, control chain 65 is pulled downwardly which moves theparts' to the position indicated in Fig. 7, where the valve ports are related as shown in Fig. 3. It will be seen-that thesmall port 19 .in the valve plug now registers with a corresponding port 20 leading to the auxiliary burner 21 in the valve block and that gas is thereby supplied to said auxiliary burner, which then ignites from the'heat of the main mantle burner,the supply of gas to which latter burner has been sub- 7 stantially unaltered by, movement of the valve plug. The flame of the auxiliary burner now plays against the hooded terminal 57 .of the heater member 56 as shown in Fig. 7, which latter member conducts heat from said, flame to the thermostat. The thermostat upon being thus heated straightens or bends generally outwardly, assuming the broken line position indicated in Fig. 7 after a certain time interval; whereupon the, spur 52 releases the dog member 36 and this latter is immediately impelled by the spring 38 to the position shown in Fig. 8, where the relation of valve ports is as shown in Fig. 4, and all gas supply to both the auxiliary heater burner and to the main mantle burner has been out 01f. The pilot flame. 29 however remains burning and when gas is again supplied to the main mantle burner, ignites the latter. r

The valve may be opened again at will for supplying gas to the main mantle burner, by pulling downwardly on chain 68. This restores all parts to the original positions shown in Figs. 4 and 6 as before explained. It should be noted that in this .position, no gas is supplied to the auxiliary burner 21 and that the main mantle burner is adapted to remain in operation for an indefinite period of time. I g It will be obvious to those skilled in the art that the exact embodiment of my invention herein chosen for illustrative purposes may be varied in many Ways without departing from the fundamental elements and operative principles: thereof.

Having therefore thus broadly described the construction and operation of a preferred embodiment of my present invention, what I claim as nevd'ist 1. In a Bunsen gas burner arrangement, including acontrolling gas valve for said burner, and a mixing chamber for the gas vand air having openings for the entrance of air thereto, in combination; a normally inactive auxiliary burner operatively 'remote from the unburned gas in said mixing chamber; and manually'operable and automatically acting mechanism operatively related to said valve and arranged to govcm the flow of gas to said auxiliary burner, said mechanism including a thermostat arranged to be subjected to the heat from said auxiliary burner, and thereby to be made operative to cause a movement of said valve.

.. 2. In a Bunsen gas burner arrangement including a controlling gas valve for said burner, and located therebelow, and an upright tubular mixing chamber for the gas and air, said chamber having openings near its lower end for the entrance of air thereto, in combination; a normally inactive auxiliary burner located adjacent to-said mixing chamber but operatively isolated from the unburned gas therein; and manually operable, automatically acting mechanism operatively related to said valve and arranged to govern the flow of gas to saidauxiliary burner, said mechanism including a thermostat arranged to be subjected to the heat from said auxiliary burner, and thereby to bemade operative to cause a movement of said valve.

3. In a. Bunsen gas burner arrangement including a controlling gas valve for'said burner and a mixing chamber for the gas and air having openings for the entrance of air thereto, in combination; a normally inactive auxiliary burner operatively remote from the unburned gas in said mixing chamber; and manually operable and automatically acting mechanism operatively related to said valve and arranged to govern the flow of gas to said auxiliary burner, said mechanism including a thermostat with a separate heat-conducting member therefor extending therefrom and terminating in a perforated hoodpositioned above said auxiliary burner to be heated thereby.

4. In a Bunsen gas burner arrangement movement of the air in approaching said openings and before entrance to the mixing chamber, in combination; a normally'inactive, auxiliary burner with its gas outlet higher than the bottom of said shield and arranged so that the flame thereof. shall be isolated by/said shield from igniting relation withifnburned gas in said mixing chamber; and manually operable and automatically acting mechanism operatively related to saidvalve and arranged'to govern thev ber, and arranged'to be ignited by the said Bunsen burner; andmanually operable and automatically acting mechanism operatively related to. said valve-and arranged, to govern the flow of gas to said auxiliary burner, said mechanism including a thermostat arranged to be subjected to the'hea't from said auxiliary burner, and. thereby to be made operative to cause a movement of said valve.

6. In an incandescent, illuminating gas v burner employing a cluster of mantles suspended from the upper portion ofa vertical, tubular mixing chamber for the gas and air of the Bunsen burner, said mixing chamber having in its lower portion openings for the entrance of air thereto, in combination; a valve adapted to control the flow of gas to said burner and positioned therebelow, a

normally inactive, auxiliary burner operatively remote from the unburned gas in said mixing chamber and positioned below said mantles to be ignited thereby; and manually operable and. automatically acting mechanism, operatively related to said valve and arranged to govern-the flow of, gas to said auxiliary burner, said mechanism including a controlling thermostat with a separate heatconducting member therefor arranged to be heated by said auxiliary burner, the said thermostat thereby to be made operative to, cause a movement of said valve.

7. In an incandescent illuminating gas burner employing a cluster of mantles suspended from the upper portion of a vertical, tubular mixin chamber for the gas and air of the Bunsen urner, said mixing chamber having in its lower portion openings for the entrance of air thereto, in combination; a valve adapted to control the flow of gas to said burner and positioned therebelow, a normally inactive, auxiliary burner operatively remote from the unburned gas in said,

mixing chamber and positioned below said mantles to be ignited thereby; and manually operable and automatically acting mechanism, operatively related to said valve and arranged to govern the flow of gas to said auxiliary burner, said mechanism including a controlling thermostat arranged to be heated by said auxiliary burner, the said thermostat thereby to be made operative to cause a movement of said valve.

8. In an incandescent illuminatin gas burner comprisin a plurality of ownwardly disposed el outlets at the upper portion of an upright, and central Bunsen burner mixing tube for the as and air-of the illuminating burner, sai outlets being externally threaded and cotlperating with illuminating mantles suspended therefrom, and said mixing tube having air inlets thereto partially encompassed b a downwardly disposed shield exterior t ereof, in combination; a valve adapted to control the flow of gas to'said illuminating burner and positioned .below said air inlets; a normally inactive auxiliary burner, adjacent to said mixing tube, "operativel isolated from the unburned as therein y said air inlet shield, and positioned below said mantles to be ignitedthereby and manually-operable, automatically-acting mechanism, operatively related to saidvalve and arranged to govern the flow of gas to said auxiliary burner,.

said mechanism includinga controlling thermostat with a separateheat-conducting extension therefor terminating in a hooded, perforated portion positioned above said auxiliary burner to receive heat from the flame thereof andoperative to conduct such heat to the thermostat, said thermostat thereby bemg made operative to cause a movement ofsaid valve.

9. A Bunsen burner and main gas valve arrangement, with means automatically to actuate the latter, the arrangement embodying a Bunsen burner with the mixing 'chamber and its air intake and a gas valve; a main gas valve interposed between the gas supply and the chamber intakes and valve,

and automatically-acting means operatively associated with and connected to the said main gas valve, the said automatic means including a controlling thermostat mounted operatively to flex and a heater burner therefor separately and'independently mounted, the latter burner and'the terminal of a coeperative non :flexing I heat receiving and conducting extension operatively connected to the'thermostat being located operatively remote from the, chamber intake ports.

10'. A Bunsen gas burner having in combination, a main gas controlling valve and automatically acting, thermostatically controlled mechanism to actuate the valve, and

- embodying in the cooperative arrangement,

an upwardly acting mixing chamber for the gas and air with air intake ports at 'the lower end thereof; a gas valve located between the chamber ports and said main gas controlling valve, automatically-acting means, normally inactive and denerglzed,

operatively related to said main gas valve,

" iary burner therefor, both extending and located above said chamber ports, said auxiliary burner being also positioned to be antomatically ignited fom said Bunsen burner and adapted, when active, to thermally energize the thermostat and thereby to cause a movement of said main gas valve.

11. A Bunsen gas burner having, in combination, a main gas controlling valve and automatically-acting, thermostatically-controlled mechanism to actuate the valve; and embodying, in the cooperative arrangement, an upwardly acting mixing chamber for the gas and air with air intake ports at the lower end thereof; a gas valve located between the chamber ports and said main gas controlling valve; automatically actin means, normally inactive. and denergize operatively related to a valve stem for said main gas valve, and also located below said chamber ports and valve, and including a controlling thermostat; a heat receiving and conducting extension for said thermostat with an auxiliary burner therefor, both extending and located above said chamber ports, said auxiliary burner being also positioned to be automatically igmted from said Bunsen burner; and independent gas ports in said valve stem for the main burner and the auxiliary burner said auxiliary burner bein adapted when active to thermally energize the thermostat and thereby to cause a movement of said main gas valve.

12. A Bunsen gas burner having in combination; a main gas controlling valve and automatically-acting, thermostatically-controlled mechanism to actuate the valve; and embodying, in the cooperative arrangement, an upwardly acting mixing chamber for the gas and air with the air intake ports at the lower end thereof; a gas valve located be tween .ne chamber ports and said main gas controlling valve; automatically actln means, normally inactive and deenergize operatively related to a valve stem for sai main gas valve, a d also located below said chamber ports a d valve, and including a controlling thermostat with an auxiliary burner for the thermostat, said auxilia burner bein also positioned to be automatically ignite from said Bunsen burner; mports in said valve stem for.

dependent gas the main burner and the auxiliary burner; and single-acting, manually operable control means operatively related both to said valve stem and to said automatically acting mechanism, and adapted cooperatively upon suitable movement thereof to open said main valve and maintain the auxiliary burner port closed, and further adapted upon reverse movement thereof cooperatively to open the auxiliary burner port and to energize said automatically acting means for later operative release by said thermostat, thereby to close the valve ports of both said main and said auxiliary burners.

13. A mantle gas burner. having, in combination with a. main gas valve, automatically acting, thermostatically-controlled mechanism to close the valve, and embodying, in the cooperative arrangement, a mam Bunsen burner with an upwardly acting mixing chamber and with the air intake ports and gas control valve at the lower end; a plurality of mantles suspended from the opposite end of the mixing chamber and cooperating with related outlets from said chamber; a main gas valve'located between the chamber ports and valve; automatically actin means, normally inactive and deenergiz operatively related to a valve stem for said main gas valve,'and also located below said chamber ports and valveand including a controlling thermostat; a

heat receiving and conducting extension for .said thermostat with an auxiliary burner therefor, both extending and located above said chamber ports, said auxiliary burner being also positioned to be automatically ignited from a mantle; independent ports in said valve stem forthe main burner and I the auxiliary burner; and single-acting, manually operable control means operatively related'both tosaid valve stem and to said automatically acting mechanism, and adapted cooperatively, upon suitable movement thereof, to open said main valve and to maintain the auxiliary burner port closed, and further adapted upon reverse movement thereof, cooperativelyto open the auxiliary burner port and to energize said automatically-actmg means for later operative release by said thermostat,'thereby to close the valve ports of both said main and said auxiliary burners.

14. A mantle gas burner arrangement, embodying in combination; a main gas burner with a-control valve therefor; a pi lot burner with a, gas connection to supply it when the main valve is closedfsaid pilot burner beingl operatively related to the main burner so t at each will ignite the other; thermostatically controlled, automaticallyacting mechanism, adapted when energized and released to overn the main burner control valve, and including 'a thermostat arranged to be operatively heatedby gas flame from an auxiliary burner, normally inactive, arranged to heat said thermostat; and gas supply control means for said auxcontrol means for sai of the auxiliary burner.

and inter- 7 connected t at automatic turnout of the main valve automatically cuts out operation Signed in Boston, Massachusetts, this 27th day of July, 1916.

RAYMOND D. SMITH Witnesses:

J E. BLACKMAN, E. L. MOFADDEN. 

